Denon link for multichannel PCM to AVR?

Denon Link / Denon Link 4th Features

This link was established to transfer DVD-A or SACD data from a Denon player to a Denon AVR.

I wonder if the protocol can be abused to transfer multichannel PCM? After all, HDMI is not well implemented for audio.

There was a brief discussion here but that is all I could find. Apparently, user psycoman was able to connect a regular DAC to his player but kept expierencing dropouts.
https://www.diyaudio.com/forums/digital-line-level/126573-denon-link-pinout.html